Whelan, Jean K; Sato, S (1980): (Table 1) CH4 and delta 13C, methane at DSDP Leg 56 Holes. PANGAEA, https://doi.org/10.1594/PANGAEA.823105, In supplement to: Whelan, JK; Sato, S (1980): C1-C5 hydrocarbons from core gas pockets, Deep Sea Drilling Project Legs 56 and 57, ...